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4-2. TAPE Maintenance Mode (M0)
4-2-3. RF CHECK Mode (C1)
4-2-4. BETACAM PB CHECK Mode (C3)
For Condition NG (C11)
Recheck according to the procedures below.
(1) If a check is performed without using alignment tape
SR5-1/SR5-1P, recheck in the menu C11 using the
alignment tape SR5-1/SR5-1P.
When no abnormality is found, the recheck is completed.
n
When no abnormality is found during the check using
the alignment tape, a trouble (tape is damaged or
recording is not done properly) is considered to exist
on the tape portion used in the previously check.
(2) Change the playback portion on the alignment tape.
(3) Recheck in the menu C11.
When no abnormality is found, the recheck is completed.
(4) Clean the drum using a cleaning tape according to
Section 5-2-1.
(5) Recheck in the menu C11 using the alignment tape.
When no abnormality is found, the recheck is completed.
(6) Clean the drum using the cleaning tape again (the
amount of the tape used is 15 seconds)
(7) Recheck in the menu C11 using the alignment tape.
When no abnormality is found, the recheck is completed.
(8) Clean the drum (video heads) with a cleaning cloth
according to Sections 5-2-2 and 5-2-3
(9) Recheck in the menu C11 using the alignment tape.
When no abnormality is found, the recheck is completed.
If the error condition is not improved in the way mentioned
above, the possible cause below are considered.
. Servo system adjustment defect or circuit defect
8 Readjust the servo system. (A00-01 : SERVO
ADJUST)
8 Check the servo system. (C03 : REEL/CAPSTAN
MOTOR & FG CHECK)
. RF system adjustment defect
8 Readjust the RF system. (A1 : RF ADJUST)
. Worn PB head in the drum assembly
8 After checking the hours meter (H02 : DRUM
RUNNING HOURS), replace the upper drum
assembly as required.
(Refer to the maintenance manual part 2, volume-1.)
. In the tape transport system, adjustment defect or
component part installation defect
8 Readjust the tape transport system or reinstall the part.
(Refer to the maintenance manual part 2, volume-1.)
. EQ-56 board defect
. Drum assembly defect
4-30
4-2-4. BETACAM PB CHECK Mode (C3)
The C3 : BETACAM PB CHECK mode is used to check
the playback RF system based on a Betacam/Betacam SP
format.
In this unit, one menu is available.
C3 : BETACAM PB CHECK
C30 : CHANNEL CONDITION
Menu Tree of BETACAM PB Check Mode
n
Betacam/Betacam SP PB function of DNW-A22 is for
NTSC (525/60) system only.
Betacam/Betacam SP PB function of DNW-A22P is for
PAL (625/50) system only.
C30 : CHANNEL CONDITION
This menu displays the PB RF level condition of video
channels (Y and C) in three steps (GRN, YEL, and RED)
when the tape recorded in a Betacam/Betacam SP format is
played back in the PLAY mode.
n
If abnormality exists in the servo system, C30 : CHAN-
NEL CONDITION menu does not function properly.
To execute the check
(1) Press the SET button.
. A white square will be displayed in the upper-right
position of the superimposed display. The time data
display area will operate as a ordinary time counter.
. To stop the check, press the MENU button two times.
(2) Insert a cassette tape recorded in Betacam/Betacam SP
format.
(3) Press the PLAY button to playback the tape in the
PLAY mode.
. ">>>" will be displayed on the superimposed
display.
n
Can not be checked in other than PLAY mode.
">>>" is not displayed in playing back the portion
recorded in otherwise than Betacam/Betacam SP
format or the non-recorded portion.
(4) Check to see that ">>>" is displayed in the "GRN"
column of Y and C channels.
. If ">>>" is displayed in columns other than "GRN",
refer to "For Condition NG (C30) " on the next page.
DNW-A22/A22P
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